HPS Ecal and vacuum chamber design 1 Vacuum

HPS Ecal and vacuum chamber design 1 - Vacuum chamber proposal 1. 1 - Stainless steel chamber design and calculations 1. 2 - Aluminum chamber design and calculations 2 - Ecal Crystal support frames 2 -1 - design 2 -2 - calculations Unité mixte de recherche CNRS-IN 2 P 3 Université Paris-Sud 11 91406 Orsay cedex Tél. : +33 1 69 15 73 40 Fax : +33 1 69 15 64 70 http: //ipnweb. in 2 p 3. fr Rosier Ph. – IPNO – Detector Dpt. – 27/05/2011 3 - Ecal assembly design 3 -1 Ecal frames and vacuum chamber 3 -2 Ecal frame supports principle 3 -3 Enclosure + pcb 1/24 APRIME HPS collaboration meeting

Vacuum chamber design Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 2/24 HPS Ecal and vacuum chamber presentation

Stainless steel vacuum chamber design 3 mm 2 mm Honneycomb pillar 2 mm 10 mm Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 3/24 HPS Ecal and vacuum chamber presentation

Stainless steel vacuum chamber dimensions: front cut view Internal shape in conformity with Jlab information except electron Left hole shifted of 4 mm to right , elliptic shape R 26. 63 Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 4/24 HPS Ecal and vacuum chamber presentation

Stainless steel vacuum chamber dimensions: top cut view Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 5/24 HPS Ecal and vacuum chamber presentation

Stainless steel vacuum chamber calculation: deformations Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 6/24 HPS Ecal and vacuum chamber presentation

Stainless steel vacuum chamber calculation: stress Stainless steal: 304 L WN 1. 4306. Rp 0, 2 Elastic Strength = 200 Mpa Rm (Critical Strength) = 500 Mpa Norm CODAP (Pressure vessel) Max 2/3 Rp 0. 2 = 140 Mpa Stress max 151 Mpa due to corner of pillar are singularity of calculation and not representative Max real stress = 130 Mpa Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 7/24 HPS Ecal and vacuum chamber presentation

Aluminum vacuum chamber design Thickness : 6 mm Thickness : 2 mm Thickness : 3 mm Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 Thickness : 20 mm 8/24 HPS Ecal and vacuum chamber presentation

Aluminum vacuum chamber calculation: deformations Pressure calculated on Honeycomb = 0. 97 Mpa Crush strength of Aluminum honeycomb ECM 3. 2 -130 (Euro composite)=3. 38 Mpa Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 9/24 HPS Ecal and vacuum chamber presentation

Aluminum vacuum chamber calculation: stress Aluminum 5083 Rp 0. 2 =130 Mpa Rm = 260 Mpa Max 2/3 Rp 0. 2 = 85 Mpa Stress max 97 Mpa due to corner of pillar are singularity of calculation and not representative Max real stress = 70 Mpa Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 10/24 HPS Ecal and vacuum chamber presentation

Conclusions about the 2 vacuum chamber design proposal The 2 chambers follow the design rules (french CODAP for pressure vessels) But… From the mechanical point of view , stainless steel is better : 1) In terms of manufacturing and welding (more common in industry) 2) The rear side of the horizontal plates of 3 mm (instead 6 mm Aluminum) gives a bigger gap for cooling tubes, insulation and preamps Simulations must also show results with steel Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 11/24 HPS Ecal and vacuum chamber presentation

HPS Ecal frames design Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 12/24 HPS Ecal and vacuum chamber presentation

Crystal support frames design Same design as DVCS but simplified (rectangular) 2 spacers to block them 46 crystals on a line 2 metal sheets (thickness= 0, 12 mm) tensed and glued on the frames Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 13/24 HPS Ecal and vacuum chamber presentation

Crystal support frames stacking (1) The frames are stacked one by one (APD control at each line) Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 14/24 HPS Ecal and vacuum chamber presentation

Crystal support frames stacking (2) The frames are clamped with screws 2 beams added to give more inertia at the assembly Each side is clamped with a strong support plate 1 3 Screws on each frame rear frames front frames Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 front adjustment of the frames 15/24 HPS Ecal and vacuum chamber presentation

Crystal support frames calculations D max =0, 042 mm Front frames Stress max : 12 Mpa D max =0, 07 mm Rear frames Stress max : 18 Mpa Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 16/24 HPS Ecal and vacuum chamber presentation

Assembly design Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 17/24 HPS Ecal and vacuum chamber presentation

The vacuum chamber with the ECAL Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 18/24 HPS Ecal and vacuum chamber presentation

Top and bottom ECAL independent adjustment Adjustment system for each block Support Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 19/24 HPS Ecal and vacuum chamber presentation

The vacuum chamber with the ECAL: top view Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 20/24 HPS Ecal and vacuum chamber presentation

The vacuum chamber with the ECAL: front cut view Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 21/24 HPS Ecal and vacuum chamber presentation

Detail of the gaps between ECAL and chamber Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 22/24 HPS Ecal and vacuum chamber presentation

Connection to the preamps and read-out 2 Connection board R + L 2 mother board R + L PCB Copper plate Connection similar to DVCS Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 23/24 HPS Ecal and vacuum chamber presentation

Thermal enclosure Copper plates with cooling tubes around the Ecal Rindel. Emmanuel– IPNO – Detector Dpt – 27/05/2011 6 mm foam for insulation 24/24 HPS Ecal and vacuum chamber presentation